Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 11, 2022	Jun. 30, 2021
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-39153
Entity Registrant Name	Healthcare Trust, Inc.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	38-3888962
Entity Address, Address Line One	650 Fifth Ave.
Entity Address, Address Line Two	30th Floor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10019
City Area Code	212
Local Phone Number	415-6500
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 0
Entity Common Stock, Shares Outstanding		100,735,691
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement to be delivered to stockholders in connection with the registrant’s 2021 Annual Meeting of Stockholders are incorporated by reference into Part III of this Form 10-K. The registrant intends to file its proxy statement within 120 days after its fiscal year end.
Entity Central Index Key	0001561032
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false
Series A Preferred Stock
Document Information [Line Items]
Title of 12(b) Security	7.375% Series A Cumulative Redeemable Perpetual Preferred Stock, $0.01 par value per share
Trading Symbol	HTIA
Security Exchange Name	NASDAQ
Series B Preferred Stock
Document Information [Line Items]
Title of 12(b) Security	7.125% Series B Cumulative Redeemable Perpetual Preferred Stock, $0.01 par value per share
Trading Symbol	HTIB
Security Exchange Name	NASDAQ